Dallas gets about 30 inches (760 mm) of rain per year,
much of which is delivered in the spring time. The climate of Dallas is
classified a humid subtropical climate, yet this part of Texas also tends
to get hot, dry winds from the north and west in the summer. In the winter,
the winds are cool, which can cause the region to fall below freezing
occasionally. A few inches of snow for a day or two falls about once each
winter, and about every other winter the cool air from the north and the
humid air from the south lead to freezing rain, which usually causes the
city to come to a screeching halt for a day or two if the roads and highways
become dangerously slick. Regardless, winters are relatively mild compared
to the Texas Panhandle and other states to the north. Dallas winters are
occasionally interspersed with Indian summers.

Spring and fall and the pleasant, moderate temperatures accompanying
those seasons are somewhat short-lived in Dallas. However short the season
is, residents and visitors appreciate the beauty of the vibrant wildflowers
(such as the bluebonnet, Indian paintbrush and other flora) which bloom
in spring and are planted around the highways throughout Texas. In the
spring the weather can also be quite volatile and change quickly in a
matter of minutes. The cliche about volatile climates popular in various
parts of the US—"if you don't like the weather, wait a little
while and it'll change"—applies well to Dallas' spring weather.
Many consider autumn, around late September and October, to be the best
time to visit the Metroplex. Yet many events are also scheduled for the
more volatile season of spring.

Ongoing comparisons are made between Dallas' summer weather and Houston's.
Texans generally agree Houston is significantly more humid and Dallas
is slightly hotter, although given Houston's humidity it may have a higher
heat index than Dallas.